The vertebral arteries originate as the first branches of which arteries bilaterally?

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Explore the Hemispheres 3.0 Level I Brain Anatomy and Physiology Test. Study with detailed questions, answers, and hints. Enhance your knowledge and boost your preparation for success!

Multiple Choice

The vertebral arteries originate as the first branches of which arteries bilaterally?

Explanation:
The vertebral arteries arise as the first major branches of the subclavian arteries on each side. From there they ascend through the transverse foramina of the cervical vertebrae, enter the skull via the foramen magnum, and join to form the basilar artery, contributing to the brain’s posterior circulation. The right subclavian comes off the brachiocephalic trunk, while the left subclavian comes directly from the aortic arch, so the vertebrals are not branches of the aorta or carotid arteries.

The vertebral arteries arise as the first major branches of the subclavian arteries on each side. From there they ascend through the transverse foramina of the cervical vertebrae, enter the skull via the foramen magnum, and join to form the basilar artery, contributing to the brain’s posterior circulation. The right subclavian comes off the brachiocephalic trunk, while the left subclavian comes directly from the aortic arch, so the vertebrals are not branches of the aorta or carotid arteries.

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